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Finding the Fourth Proportional to 69,055.62, 103,578.54 and 39,380.46

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Solution

The fourth proportional to 69,055.62, 103,578.54 and 39,380.46 is: 59,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,055.62 : 103,578.54 = 39,380.46 : x
  2. Step 2: Convert to fraction form
    69,055.62/103,578.54 = 39,380.46/x
  3. Step 3: Cross multiply
    69,055.62x = 103,578.54 × 39,380.46
  4. Step 4: Simplify right side
    69,055.62x = 4,078,970,551.33
  5. Step 5: Solve for x
    x = 4,078,970,551.33/69,055.62
  6. Step 6: Final answer
    x = 59,067.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.